Method for producing dual zone materials by use of an...

Details Method for producing dual zone materials by use of an... Method for producing dual zone materials by use of an...

B - Operations, Transporting

01

J

252/34

B01J 20/32 (2006.01) B01J 20/22 (2006.01) B01J 20/28 (2006.01)

Patent

CA 2007821

Dual zone porous materials having an external zone and an internal zone are prepared by contacting a suspension of a porous support, such as particulate silica, in an aprotic solvent with an organosilane mixture of a first organosilane having silyl groups of a first type and a second organosilane of a second type in order to form silyl groups of a first type predominantly or the external surfaces of the porous support and silyl groups of a second type predominantly on the internal surfaces of the porous support.

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